Portable elevator



May 8, 1951 D. L.. LAWSON PORTABLE ELEVATOR 5 Sheets-Shee'tl 1 Filed Oct. 25, 1947 www@ W umg/f May 8, 1951 D. L. LAWSON PORTABLE ELEvAToR 5 Sheets-Sheet 3 Filed Oct. 23. 1947 Uhl V//l l//l l V// Inventor 23 Dan/'el L. L awson Patented May 8, 1951 UNITED STATES PATENT OFFICE 3 Claims.

This invention relates to improvements in portvide an improved wheel-supported vehicle upon which a vertically extending elevator shaft for a portable elevator will be mounted, together with a prime mover also mounted upon said vehicle and having means connected with said elevator shaft for operating the elevator supported thereby.

Another object of the invention is to provide an improved wheel-supported truck upon which an extendable elevator and its operating means will be supported, together with a hinged chute supported by said elevator shaft.

Another object of the invention is to provide a Wheel-supported elevator and power operating means therefor which will be highly eflicient in operation, and relatively inexpensive to manufacture and produce.

Other objects will appear as the description proceeds.

In the accompanying drawings which form a part of this application,

Figure l is a side elevation of the improved portable elevator shown in vertically extended position adjacent a building scaffold;

Figure 2 is an end elevation of the improved portable elevator shown in vertically extended position adjacent a building scaffold;

Figure 3 is a sectional View taken on the line 3 3 of Figure 7 Figure 4 is an enlarged side elevation of the elevator shaft showing the removable guide sections supported in operative position thereon;

Figure 5 is a sectional view taken on the line 5 5 of Figure 2;

Figure 6 is a perspective view of one of the elevator boxes or containers showing a slide fixed to the said box or container;

Figure 7 is an enlarged side elevation of the elevator shaft with hinged chute supported thereby;

Figure 8 is a detail View taken on the line 8 8 of Figure 7,'

Figure 9 is a detail plan view partly broken away and in section of the cable clamping box or container supporting shaft; and

Figure 10 is a fragmentary side elevational view of a scaffold as used with this invention.

Like characters of reference are used throughout the following specification and the accompanying drawings to designate corresponding parts.

In carrying out the invention, there is provided a chassis frame generally designated by the reference numeral I having axles 2 and supporting wheels 3. Positioning or steadying brackets or braces 4 are hinged at 5 to the opposite ends of the chassis frame I, and are adapted to be swung upwardly when not in use, as shown in dotted lines in Figure 1 of the drawings.

`vertically disposed standards 6 are supported by the chassis frame I, and a horizontal platform 'I is secured to the upper ends of said standard 6.

A cylindrical metal elevator shaft 3 is supported by the platform 'I at one side thereof, being reinforced by means of the oppositely disposed vertical metal webs 9 and I0, attached to said shaft and to the framework of the platform 1.

The cylindrical metal elevator shaft 8 is provided with permanently attached oppositely disposed vertical guide rails II on its lower portion, and with removable lengths of guide rails I2 being detachably secured to the upper portion of the shaft 8, as clearly illustrated in Figure 4 of the drawings.

The opposite ends of the hollow cylindrical shaft 8 are bifurcated and support the transversely extending shafts I3 and M upon which the pulley wheels I5 and I6 are mounted for rotation. A continuous or endless steel cable Il is disposed about and between the pulley wheels I5 and I5, and a sprocket Wheel I8 is attached to the lower shaft I4 for rotation therewith.

A suitable motor or engine I9 for operating the elevator will be mounted upon the chassis frame I, and will be provided with a driving sprocket wheel 20 disposed upon the motor shaft ZI, the same being connected with the sprocket wheel I8 by means of the sprocket chain 22, whereby said cable Il will be operated about the pulley wheels I5 and I6 supported at the opposite ends of said hollow elevator shaft 8.

A chute 23 having an upper section 24 hinged thereto at 25 will be attached to and supported by the metal elevator shaft 8 byA means of the upper and lower bracket-supporting'arms 26 and 21 respectively.

Right angularly disposed box or container trip arms 28 will be secured to the cylindrical shaft B in any desired position for tripping and tilting the boxes or containers 29 so that they will dump their contents down the chute sections 23 and 24 onto the scaiold 30 disposed at the side of the building 3| which is under construction.

A plurality of boxes or containers 29 will be provided and formed with solid bottoms 32, inner side walls 33, one closed or solid end 34, and a cross braced outer side wall 35, leaving one end 36 open for loading and unloading purposes.

A guide 37 which is I-shape in cross section-is Welded at 38 to each of said boxes or containers 29, and supports a pivot clamp 39 formed with a head 49 on its outer end and having a cable clamp #il on its inner end for attachment to the elevator cable Il. The boxes or containers 29 are adapted to be tilted and dumped automatically by contact with the trip arms 28, and one or more L-shaped platform carriers E2 will be provided and attached to the elevator cable i7 for supporting buckets of mortar or other-containers which will not be automatically dumped, since the platform carriers 52 lwill not-be engaged by the trip arms 28.

It will be understood that the elevator will be used When constructing buildings requiring scaffolds 39 of from approximately ninefeet to twenty feet in height.

A trip arm 43 will be attached to the opposite or rear lower side of the elevator shaft 8 for engaging the boxes or containers 29 as they descend the `rear side of the 'shaft '3, for turningr them upright to the correct position for reloading.

In operation, the motor or engine i9 will be controlled by a suitable clutch (not shown) for intermittently operating the elevator cable Il er stopping the movement of the same while the boxes or containers 29 are being loaded from the platform 1.

From the foregoing description, it will be apparent that there has been provided a highly efficient form of wheel-supported portable poweroperated elevator which will be relatively inexpensive to manufacture and produce.

While the preferred embodiment of the instant invention has been illustratedand described, it

Will be understood that it is not intended to'limit the scope of the invention thereto, as many minor changes in detail of construction maybe resorted to Without departure from the spirit of the invention.

Having described the claimed as new is:

1. A portable elevator comprising a wheelsupported chassis, a loading platform supported invention, what is `by portions of said containers to tilt the containerstoward said chute, said hinged portion of the chute being also engaged and tilted by the containers, whereby the containers are successively unloaded'into said hinged portion and the hinged portion is tilted by the succeeding container vfor positive unloading of the hinged portion into the remaining portion of the chute.

v2. The subject matter asclaimed in-claim l, and including a container trip arm'on saidvshaft adjacent said chute, and acontainer--trip'arm on a lower portion of said shaft to'engage the boxes or containers and to turn them upright into vposition for re-loading.

3. A portable elevator comprising la Wheelsupported chassis, a loading platformsupportecl thereby, a vertical cylindrical metal elevator shaft supported by said platform, reinforcing Webs attached to said shaftfand'platform, rotatable pulleys mounted in the Yopposite ends of said shaft, an endless cable aboutsaid pulleys, removableguide rails detachably secured vto said shaft, containers having I-shaped .slides Ysupported upon said guide rails,A cable clamping means connected between said .containers and said cable, a sprocket wheel operable with said lower pulley, a prime mover on said chassishaving a sprocket Wheel on its shaft, and a sprocket chain connecting said'sprocket wheels.

YDANIEL L.LAWSON.

REFERENCES 'CITED The following references areof record `inthe le of this patent:

UNITED STATES PATENTS Germany Oct. '5, '1932 

